Home / 139,549.08-192,571.88-79,123.80

Finding the Fourth Proportional to 139,549.08, 192,571.88 and 79,123.80

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Solution

The fourth proportional to 139,549.08, 192,571.88 and 79,123.80 is: 109,187.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,549.08 : 192,571.88 = 79,123.80 : x
  2. Step 2: Convert to fraction form
    139,549.08/192,571.88 = 79,123.80/x
  3. Step 3: Cross multiply
    139,549.08x = 192,571.88 × 79,123.80
  4. Step 4: Simplify right side
    139,549.08x = 15,237,018,918.74
  5. Step 5: Solve for x
    x = 15,237,018,918.74/139,549.08
  6. Step 6: Final answer
    x = 109,187.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.